Ryan Sheehy
How do you sort a two-dimensional array in Python easily without importing libraries? Thankfully, some native functions in Python make sorting arrays a breeze. I recently had a project where I had the following data structures, representing each unpaid invoice by the customer, the days they were overdue and how much was outstanding. Here’s a …
How do you calculate the simple average of a list of numbers in Python, without needing to import any libraries? Unfortunately, there’s no native average or avg function in Python to easily calculate the average of a list containing just numbers: To calculate the average of a list of numbers in Python, use the sum …
How can you check if a word is found in a string using Python? Recently, I had an issue where I wanted to exclude strings from a list if they contained a certain word. I thought I could use the following common code familiar to most using Python: But the problem ended up being a …
How can you sort a list of dictionaries by a key contained in each dictionary using Python? Can you do it in 1 line to show off your friends? Of course! To sort a list of dictionaries use the sorted() function with the key parameter set to a lambda function that uses the common key …
How do you sort a list by the second (or nth) element on in Python? How can you leave the first or nth elements in a list as they are but then have the remaining elements in the list sorted? When applying the .sort() list method on a list Python will sort all elements in …
There have been times when after creating a list in Python I’ve wanted to sort a list and then have the list reversed from ascending to descending. To reverse the order of a list in Python use either the .reverse() list method which mutates the original list, or the slice operator technique [::-1] which returns …